R语言是一款用于统计计算和图形编辑的免费软件环境。 R is a free software environment for statistical computing and graphics.

Sublime text 3 编辑器

Sublime text 是一款代码、标记和散文的高级文本编辑器。 Sublime text is a sophisticated text editor for code, markup and prose.

CMD 命令符

CMD命令符是微软公司创建的 Windows操作系统系列中的一个命令行解释器。 Command Prompt or CMD is a command line interpreter in the Windows family of operating systems created by Microsoft Corporation.